"use strict";

const loaderUtils = require("loader-utils");
const path = require("path");

module.exports = function getCssModuleName(
  context,
  localIdentName,
  localName,
  options
) {
  // Use the filename or folder name, based on some uses the index.js / index.module.(css|scss|sass) project style
  const fileNameOrFolder = context.resourcePath.match(
    /index\.module\.(css|scss|sass)$/
  )
    ? "[folder]"
    : "[name]";
  // Create a hash based on a the file location and class name. Will be unique across a project, and close to globally unique.
  const hash = loaderUtils.getHashDigest(
    path.posix.relative(context.rootContext, context.resourcePath) + localName,
    "md5",
    "base64",
    5
  );
  // Use loaderUtils to find the file or folder name
  const className = loaderUtils.interpolateName(
    context,
    fileNameOrFolder + "_" + localName + "__" + hash,
    options
  );
  // remove the .module that appears in every classname when based on the file.
  return className.replace(".module_", "_");
};
